"Regardless of what I did personally, I just think that abstinence is the only ... 100 percent foolproof way to prevent pregnancy," she told "Good Morning America" today, backing away from a previous statement on Fox News that abstinence wasn't realistic, saying it was taken out of context.

"I knew that it would be a huge shock and a huge surprise for my parents," she said, adding that their disappointment eventually turned into support. "I hope that me speaking out now will prevent girls from having to do that in the future."

Palin said son Tripp, born in December, is sitting up, rolling over and starting to giggle. "He's doing awesome," she said. "He's getting so big and so chubby."

But Palin said he life consists mainly of school, diapers, bottles and chores, all on a "few hours of sleep."

"It's a 24-hour job and that's a huge responsibility," she said. "Your priorities completely change once you have a baby."

But Palin said giving up the baby or terminating the pregnancy was never an option. "I knew from the second I found out I was pregnant I was going to keep the baby," she said.

Still, if she could do it all over again, Palin said she would wait to have sex. "My son is a blessing. He's the best thing that ever happened to me He's the love of my life but I do wish that years from now I could have had the same son."

Studies show that 80 percent of pregnant teens don't marry the fathers of their babies, which includes Bristol Palin. Though she and then boyfriend Levi Johnston announced their engagement once the news of their pregnancy was revealed, the pair broke up shortly after the birth of their son.

The former couple's relationship has since been tenuous, at best, with 19-year-old Johnston being labeled as a deadbeat dad by Sarah Palin's father.

Bristol Palin said she wants to maintain some kind of relationship with Johnston for the benefit of her son. "I'd love Levi to be a part of his life and I know he will be," she said. "Every child needs a father."

Palin said she didn't pay much attention to the intense media coverage that started when her mother was thrust into the national spotlight during the presidential campaign, including Tina Fey's Sarah Palin impersonation. "It's unreal," she said.